Pipe coupling with a locking device

Abstract

A locking device for pipe couplings of the non-threaded type arranges an elongated rotatable cam transversely of the coupling in engagement with a pipe positioned therein and extending therefrom to forcefully engage the pipe in the coupling to prevent deviation from the axis of the coupling as well as rotation of the coupling relative to the pipe or vice versa.

Although but two embodiments of the present invention have been illustrated and described, it will be apparent to those skilled in the art that various changes and modifications may be made therein without departing from the spirit of the invention and having thus described my invention what I claim is: 
     
       1. An improvement in a separable coupling for joining together a pair of pipes and having a cylindrical body with a pair of open ends, each for receiving one of said pair of pipes and means inwardly of said open ends for engaging said pipes and acting to hold said pipes in said coupling, sealing means in said coupling inwardly of said engaging means and longitudinally projecting offset bosses on each end of said coupling extending beyond said open ends in positions spaced with respect to the outer surfaces of said pipes positioned in said coupling; the improvement comprising rotatable elongated members positioned crosswise of and alongside said outer surfaces of said pipes beyond said open ends and between said projecting offset bosses and said outer surfaces of said pipes for wedging engagement therebetween. 
     
     
       2. The improvement in a separable coupling for joining together a pair of pipes set forth in claim 1 and wherein each of said rotatable elongated members is cross sectionally round and has a longitudinally tapered flat surface on one side thereof extending inwardly from one end thereof. 
     
     
       3. The improvement in a separable coupling for joining together a pair of pipes set forth in claim 1 and wherein each of said rotatable elongated members is cross sectionally round and has a longitudinally tapered flat surface on one side thereof extending inwardly from one end thereof and a thread pattern formed in the remainder thereof. 
     
     
       4. The improvement in a separable coupling for joining together a pair of pipes set forth in claim 1 and wherein a groove is formed in the inner surface of each of said bosses and arranged for registry with one of said elongated members, said grooves being positioned transversely of said bosses. 
     
     
       5. The improvement in a separable coupling for joining together a pair of pipes set forth in claim 1 and wherein said elongated members are cross sectionally square and wherein the inner surface of each of said bosses is flat and on a transverse plane with respect to said coupling.